Research progress in homogeneous oxidation mechanism of element mercury in oxy-fuel combustion flue gas

HU Changxing; LI Wei; YU Xiaoyi; ZHENG Jiao; GAO Fuyan; XU Meijuan; LI Jianxin

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Research progress in homogeneous oxidation mechanism of element mercury in oxy-fuel combustion flue gas

Thermal Power Generation Vol. 44, Issue 7, Pages: 1-6(2015)

更新时间：2025-09-28

- Research progress in homogeneous oxidation mechanism of element mercury in oxy-fuel combustion flue gas
- 作者机构：
  
  浙江大学宁波理工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2015
- 稿件说明：
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HU Changxing, LI Wei, YU Xiaoyi, et al. Research progress in homogeneous oxidation mechanism of element mercury in oxy-fuel combustion flue gas[J]. Thermal Power Generation, 2015, 44(7): 1-6.
DOI：

HU Changxing, LI Wei, YU Xiaoyi, et al. Research progress in homogeneous oxidation mechanism of element mercury in oxy-fuel combustion flue gas[J]. Thermal Power Generation, 2015, 44(7): 1-6. DOI：

摘要

富氧燃烧是控制CO2排放最有效的技术之一。了解富氧燃烧气氛下汞析出形态规律

特别是在煤富氧燃烧气氛下

高H2O和CO2含量对烟气中主要氧化性组分(SO3

SO2

NO2

HCl

CO)间化学反应的作用

以及反应产物和组分与Hg0间的相互影响规律

是解决随着富氧燃烧新技术的应用而出现汞控制问题的关键。对此

本文通过查阅相关文献总结分析发现:由于不同燃烧过程会造成烟气组分不同

Hg0与不同烟气组分间的反应机理以及Hg0的形态转变机制均会对Hg0的控制方式造成根本影响。同时指出

对于富氧燃烧模式下的新烟气构成

在常规煤燃烧烟气组分基础上建立的汞排放规律、机制与机理等可能不再适用。

Abstract

Oxy-fuel combustion is the most effective technology in CO2 emission control.The mercury speciation in oxy-combustion flue gas

especially the influence of high content H2 O and CO2 on the chemical reactions among the flue gas oxidative components(SO3

SO2

NO2

HCl

CO)

as well as the interaction between the Hg0 reactants and components

were investigated

which was the key of controlling Hg emission with application of new oxy-combustion technology.From consulting references we find

during different combustion processes

the flue gas component will be different

both the reaction mechanism between the Hg0 and flue gas components and the morphology change mechanism of Hg0 will deeply affect the emission control mode of Hg0.The mercury emission rules and control mechanism based on the conventional coal combustion flue gas may not be suitable to those based on the oxy-combustion flue gas.

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